New Prius Battery Kit (GEN2, 2004-2009)

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New assembled batteries. 14 cylindrical modules versus the 28 prismatics.

What is this?

This is a DIY kit to completely and fully replace your aging or dead Toyota Prius Hybrid Battery (a.k.a. Traction Battery) with brand new battery modules, bus-bars, battery wiring harness, and interconnects. You retain your original metal enclosure and hybrid ECU.

Will this work with my Vehicle?

This is meant for Generation-2 Toyota Prius vehicles, model years 2004 through 2009. We also have kits available for Generation-1 (2001-2003) and Generation-3 (2010-2015) available with request. These modules will work in any number of Toyota and other makes that use the same Panasonic battery design, but the wiring kit is specific to the Prius. With extra (and non-supported) DIY, you could potentially make it work with many more vehicles.
Brand New Batteries: Not a refurb or rebuild. These are brand new modules fresh out of the factory and have never been in a vehicle. ZERO miles driven.
Superior Design: Cylindrical cells, half the battery modules, and all the same functionality. Upgrade your Hybrid Pack today!
Factory Warranty: A 2 year or 25,000 mile warranty on the modules. Fleet vehicles included.

How Much?

For $1600 and 4 hours of installation time, you will get a brand new hybrid battery backed by a 2-year or 25,000 mile warranty including fleet vehicles. There is nothing comparable out there. All other options that are not original Toyota Hybrid packs, are used modules. Some are refurbished and/or balanced to be better matched with one another, but they are still all used batteries from wrecked, salvaged, totalled, or other failed Prius vehicles. In contrast these batteries from are brand new and never used. When you start driving on your new pack, it starts with zero miles on it, just like a brand new Prius from the factory.

The Smarter Financial Investment

Don't waste your money on refurbished or remanufactured batteries. The only real solution to repair your Toyota Prius Hybrid Battery is to replace the entire pack. Anything else is a temporary band-aid, akin to playing the game whack-a-mole. Why spend the same money to put in used modules inside a refurbished pack instead of buying new modules from us? Our batteries at are the smartest choice for any Toyota Prius needing a Hybrid Battery pack replacement.


The Hybrid Battery is different than an original Toyota Hybrid Battery, but it is made to be interchangeable. The largest differences and features are highlighted below
Half the Modules: An original Toyota pack uses 28 modules paired into 14 blocks. We've simplified the design and now you just need 14 larger modules making the same 14 blocks
Fully Compatible: Designed to be 100% backwards compatible with the original modules. Uses the same wire connectors, same mounting, same temperature sensors, same enclosure.
Factory Warranty: A 2 year or 25,000 mile warranty on the modules
Cylindrical Cells: These cells are shaped like a series of large D-Cell batteries instead of the rectangular bricks of the original.
New Bus Bars: The kit comes complete with new solid metal bus-bars to connect adjacent modules together, new nuts, and new wiring.
No Core Charge: When you order, you get your battery pack kit. There is no extra charge for a core, and no deposit required. Your old parts can be saved or sold to offset the cost.
Standard Installation Flow

These kits are no more difficult to install than a standard battery swap. In fact, it is recommended to follow one of the many YouTube videos of how to disassemble your 2004-2009 Toyota Prius [Contact Us for Gen1 (2001-2003) and Gen3 kits (2010-2015)] to access the Hybrid Battery and to put it back together.

Disassemble Prius to Access Hybrid Battery
This involves removing the false floor, some interior plastic panels, and disconnecting the rear seats. All can be done with a socket wrench and a screw-driver. A power-drill is recommended with a socket attachment to make life easier. Average time for a first-time disassemble is roughly 1 hour. An experienced rebuilder can usually do this within 5-10 minutes.
Remove Hybrid Battery from Vehicle
This is a heavy part, it is best to have help. You will need to access the bottom of the pack, so it does need to be fully removed. It cannot be worked on in the car.
Disassemble Original Hybrid Battery
Remove the cover, remove the battery nuts, remove the bus bars, disconnect the venting, disconnect the temperature sensors, remove the tension bar, and end up with the shell of a battery. Since there is no core charge, you are welcome to keep your old modules or to sell them on eBay for others venturing to make refurbished used packs to help offset the cost of your brand new pack! Remember if you ever intend to extract a core exchange fee, you will need your original modules at this time.
Assemble Brand New Hybrid Traction Pack
Line up your modules in serial order. Each of the 14 modules is marked from #1 through #14, and put them in order. Attach the bus-bars, battery nuts, and new wiring harness. Move battery to original enclosure. Attach temperature sensors via included clips. Attach modules from the bottom to the original battery enclosure. Complete the wiring, and put the cover back on the battery. That's it! Average time for a first install is about 1 hour if you are taking your time.
Re-Install Hybrid Battery in Vehicle
Again, this is a heavy part and it is best to have help. Carefully place the newly assembled battery back into the Prius.
Reassemble the Prius
Now it is time to put all the bolts, screws, and plastic panels that make up the rear of Prius back together. This may take an hour for a first time builder, again 5-10 minutes for an experienced installer.
Complete Install
Make sure to latch the orange safety interconnect back in-place (it can be tricky!) and READY the vehicle. If you have codes, it is best to clear them before driving. Your brand new battery is now installed and should be trouble free and worry free for a very long time. You also have the peace of mind that your brand new battery from is fully warranted for 2 years or 25,000 miles, whichever comes first. In the unlikely event of a warranty replacement, we will send you a new battery module for you to install.
Included in the Kit

The Prius Battery Kit requires some installation. If you are not comfortable working with high voltage DC, any hybrid battery installer local to your area should be able to provide the service for you, and the installer may contact us with any questions.
14 Cylindrical Battery Modules: The life-blood of your Hybrid Battery Pack.
Bus-Bars and Nuts: Solid metal bus-bars and nuts to connect the battery modules together and to the enclosure.
Wiring Harness: A new wiring harness to connect to each of the 14 modules, the safety interconnect, and the HV ECU.
Mounting Screws: To secure the battery modules to the original Toyota metal enclosure.
Battery Module Spacers: Orange High Voltage plastic spacers to secure the battery modules.
Battery Module Covers: Orange High Voltage plastic covers to limit exposed high voltage connections.
Temperature Sensor Mounts: Three plastic clips that secure the original temperature sensors to the new battery modules
Customer Support Email: If you have questions before, during, or after your installation feel free to contact us.

2 year or 40,000km/25,000mi warranty. Modules are warranted for block voltage error codes. Installation, labour, and shipping are not included in the warranty. Warranty is serviced by battery factory with as the intermediary.

15 Reviews Hide Reviews Show Reviews

  • 4
    04 Prius battery replacement Puerto rico

    Posted by Jeff kuckuk on Jan 12th 2019

    I bought a battery kit for my Prius in Puerto Rico. I don’t put a lot of miles on the car but has given me flawless performance since I installed it about a year and a half ago. I installed it myself with no real problems in less than a day. Technical support was great for the one question I had. I would definitely recommend this product! Thanks, Jeff

  • 4
    Great product. Installed according to directions and started the car. No codes and runs great.

    Posted by Keith on Jun 14th 2018

    Would give 5 star but took a while to receive and the black plastic covers were broke in the package. They give you some extras, but was still short two. I just used some pieces and tape.

  • 5
    Gen2 battery rebuild kit

    Posted by urmensch on May 1st 2018

    Kit arrived a week early in good condition. I was able to rebuild the battery working from the back seat of my 2005 Prius. Instructions are not perfect, but they never are for auto replacement parts. You need to think for yourself a bit, and have some experience with home auto repair and working with high voltages. Everything works fine; it is like a new battery.

  • 5
    Successful, though a bit tricky for a beginner.

    Posted by Jimmybob on Apr 25th 2018

    I installed this just a day ago and it was a success! I'll say right off the bat that the battery is great, but plenty of forum postings already attest to it, so I'm focusing on the negative in this review. Overall, I rate it as excellent.

    The real main issue I had (and I've seen it mentioned elsewhere) is that the safety interlock wires, which are kept from the original assembly, are too long and stiff to attach properly in this new pack without some SERIOUS persuasion. You have to really bend the wires to get them to fit, and they are very thick and stiff.

    I believe the seller mentioned on a forum that using a hairdryer or heat gun to soften the wires helps. I didn't bother with this, and mine are pressing hard against the metal casing, making it difficult to reassemble. If were doing it again, I would probably take the time to warm up the wires to easily bend them into place.

    Other minor issues (not the batteries themselves) were:

    1. The instructions were incomplete. They did not tell me how to disassemble my old battery, or which parts to remove and which ones to leave in it. They skip from "Take the battery assembly out of the car" to "Put together the new modules". Luckily, I had read about disassembly of Prius batteries, so I didn't have trouble with it.

    2. The packing foam. This stuff is extremely messy. All the new battery modules were just covered with little specks of this crap. I had to vacuum off all the modules to get the little white fragments off. A bit annoying.

    Here's to many more miles!

  • 5
    Prius Feels New

    Posted by RC on Apr 23rd 2018

    I haven’t had time to thoroughly test drive these. That said, the install was straight forward using their guide. I would recommend getting some 1000v rated, single aught electricians gloves (Google Magid) befor start. My Prius runs so smoothly after I installed these. The owner was helpful in answering questions and just talking shop. Go for it!

  • 5
    New GEN2 Battery Kit

    Posted by Voltek Hybrid & EV Repair LLC on Dec 14th 2017

    Order was shipped promptly, packaging was good so there was no damage during shipping. The kit is pretty easy to install if you're familiar with these packs. I'll be sharing data from road testing on